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Tuff Stuff

Tuff Stuff 5100XL Polished Brass Left Hand Mortise Door Lock

SKU CH-FFEE-M4BF7 MPN 5100XL

Heavy-duty mortise entrance lockset with a wide face plate, solid brass construction and screw-on knobs for left-hand doors

  • FinishPolished Brass
  • Selling UnitBox
  • TypeMortise Entry Lock Set - Surface Mounted Screw-on Knobs
  • FeaturesWide Face Plate -> front: 1-1/4" x 8"
  • Security LevelHeavy Duty
  • Location TypeCommercial/Residential
  • Heavy-duty security for commercial or residential doors with solid brass construction
  • Wide 1-1/4" x 8" face plate covers larger mortise cut-outs cleanly
  • Left-hand mortise configuration matches specific door swing requirements
  • Screw-on knobs with swivel spindle allow smooth operation and easy installation
  • Solid brass cylinder supplied with two keys provides reliable keyed-different access

Product Identity

This heavy-duty mortise entry lockset is built for commercial and residential doors that require a left-hand configuration. It features a solid brass cylinder supplied with two keys and a wide face plate measuring 1-1/4" x 8". The screw-on knobs use a swivel spindle for smooth operation.

Thermal Noise Power

As a mechanical locking device, this product generates no heat, consumes no electrical power and produces no audible noise during normal operation. Performance is entirely dependent on the precision of the solid brass components and the quality of the installation.

Sustained Load Behaviour

The wide face plate and solid brass construction are designed to withstand repeated daily use in high-traffic environments. The mortise mechanism maintains consistent deadbolt engagement and knob return over extended periods without electronic degradation or thermal throttling.

Highlights

  • Heavy-duty security for commercial or residential doors with solid brass construction
  • Wide 1-1/4" x 8" face plate covers larger mortise cut-outs cleanly
  • Left-hand mortise configuration matches specific door swing requirements
  • Screw-on knobs with swivel spindle allow smooth operation and easy installation
  • Solid brass cylinder supplied with two keys provides reliable keyed-different access

Specifications

BrandEm-D-Kay
Model5100XL
FinishPolished Brass
Selling UnitBox
TypeMortise Entry Lock Set - Surface Mounted Screw-on Knobs
FeaturesWide Face Plate -> front: 1-1/4" x 8"
Security LevelHeavy Duty
Location TypeCommercial/Residential
MaterialBrass
Backset2-1/2"
KeyingKeyed Different
StyleKnobs
SeriesMarks 91A/3-X Like
FunctionEntrance

Questions about this item

How do I install the 5100XL mortise lock into a door and what step is commonly missed?

Mortise a pocket matching the 1-1/4" x 8" wide face plate, fit the lock body, secure the surface-mounted screw-on knobs on the swivel spindle, then fit the solid brass cylinder outside and thumb turn inside — the step often missed is aligning the spindle so both knobs turn freely after the case is screwed tight.

What maintenance or replacement will the 5100XL need over time?

Lubricate the bolt and latch mechanism periodically with graphite powder; the solid brass cylinder and its two keys can be re-keyed or replaced if wear makes operation stiff, and the screw-on knobs may need tightening if the swivel spindle develops play.

What is the first limit that appears when the 5100XL sees heavy daily traffic?

The 2-1/2" backset fixes the lever geometry, so sustained high-cycle use stresses the spindle and knob screws first — expect knob looseness or spindle wear before the brass case or deadbolt shows fatigue.

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